[INFO] fetching crate zeros 19.0.0...
[INFO] testing zeros-19.0.0 against try#dec9417b8611e34e787a3e4c37686b5131f9e5c5 for pr-154210-1
[INFO] extracting crate zeros 19.0.0 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate zeros 19.0.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate zeros 19.0.0
[INFO] tweaked toml for crates.io crate zeros 19.0.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate zeros 19.0.0 on toolchain dec9417b8611e34e787a3e4c37686b5131f9e5c5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate zeros 19.0.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 608b8fc5e4c0aaa3b30a2f06830827f696ca31247e992fa6d08689ce1abf3dc0
[INFO] running `Command { std: "docker" "start" "-a" "608b8fc5e4c0aaa3b30a2f06830827f696ca31247e992fa6d08689ce1abf3dc0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "608b8fc5e4c0aaa3b30a2f06830827f696ca31247e992fa6d08689ce1abf3dc0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "608b8fc5e4c0aaa3b30a2f06830827f696ca31247e992fa6d08689ce1abf3dc0", kill_on_drop: false }`
[INFO] [stdout] 608b8fc5e4c0aaa3b30a2f06830827f696ca31247e992fa6d08689ce1abf3dc0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 98b0a5157492bfe86365ec2d6ca3afcce5bc76232a979f8d38bacf79a0a05721
[INFO] running `Command { std: "docker" "start" "-a" "98b0a5157492bfe86365ec2d6ca3afcce5bc76232a979f8d38bacf79a0a05721", kill_on_drop: false }`
[INFO] [stderr]    Compiling zeros v19.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0635]: unknown feature `bigint_helper_methods`
[INFO] [stdout]   --> src/lib.rs:66:12
[INFO] [stdout]    |
[INFO] [stdout] 66 | #![feature(bigint_helper_methods)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `zeros` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "98b0a5157492bfe86365ec2d6ca3afcce5bc76232a979f8d38bacf79a0a05721", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98b0a5157492bfe86365ec2d6ca3afcce5bc76232a979f8d38bacf79a0a05721", kill_on_drop: false }`
[INFO] [stdout] 98b0a5157492bfe86365ec2d6ca3afcce5bc76232a979f8d38bacf79a0a05721